The main advantage for underage drinking is that a bartender only has to check the birth date on the ID, whereas for self-exclusion, they would have to check the id against a database or there would have to be some kind of icon on the id.
In principle, I guess you could also think about low-tech solutions. For example, people who want to opt out of alcohol might have some slowly dissolving tattoo / dye placed somewhere on their hand or something. This would eliminate the need for any extra ID checks, but has the big disadvantage it would be visible most of the time.
The main advantage for underage drinking is that a bartender only has to check the birth date on the ID, whereas for self-exclusion, they would have to check the id against a database or there would have to be some kind of icon on the id.
In principle, I guess you could also think about low-tech solutions. For example, people who want to opt out of alcohol might have some slowly dissolving tattoo / dye placed somewhere on their hand or something. This would eliminate the need for any extra ID checks, but has the big disadvantage it would be visible most of the time.
Combine it with getting entrance to a place. It doesn’t have last too long, just long enough.